Horizontal Boring Mill Machine Feedrate Revitalization with DC Converter and PLC

This paper presents the revitalization of the feedrate system of the Stankoimport 2620B horizontal boring mill machine using a PLC controller and a DC converter with special reference to the way of adjusting the speed and current loop parameters of the converter using Matlab and OPC server. Using Matlab, a model of auxiliary movement was created and simulated. The simulation model was taken as a reference and connected to the PLC and the DC converter using the OPC server, and based on the comparison of the response difference between the simulation model and the real system, the parameters of the PI controller of the DC converter were tuned. Revitalization and reconstruction was carried out using modern components for the regulation of auxiliary movement. During the reconstruction, the components were integrated into the old system, which represents a special challenge, because the control system dating from 1970 was combined with the new control system. New electrical documentation was designed, software for the PLC controller was developed and written. After revitalization, testing was carried out in real conditions in metal machining and functionality was proven.